atom4d2,971 Followers, 1 Following, 23 Posts - See photos and videos from Atom4D Official (@atom4dofficial)Model: AAB-400.4D Atom: Class: D: Number of the channels: 4: Frequency response: 10-20000 Hz: 1 Ohm RMS Power (14.4 V) 430 W x 4: 2 Ohm RMS Power (14.4 V) 265 W